diff --git a/.github/workflows/node.yml b/.github/workflows/node.yml
new file mode 100644
index 0000000..ad02842
--- /dev/null
+++ b/.github/workflows/node.yml
@@ -0,0 +1,27 @@
+name: Node.js build
+on:
+  [pull_request, push]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        node-v: [8.x, 10.x, 12.x]
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Use Node.js ${{ matrix.node-v }}
+        uses: actions/setup-node@v1
+        with:
+          node-version: ${{ matrix.node-v }}
+
+      - name: Install package.json dependencies
+        run: npm install
+
+      - name: Run Node.js test suite
+        run: npm test
+
+      - name: Run linting
+        run: npm run lint
diff --git a/.github/workflows/php.yml b/.github/workflows/php.yml
new file mode 100644
index 0000000..4b7c6e4
--- /dev/null
+++ b/.github/workflows/php.yml
@@ -0,0 +1,22 @@
+name: PHP build
+on:
+  [pull_request, push]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        php: [7.2, 7.3]
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Install dependencies
+        run: composer install --prefer-dist --no-interaction --ansi
+
+      - name: Run tests
+        run: php${{ matrix.php }} ./vendor/bin/phpunit tests/php/*
+
+      - name: Running phpcs
+        run: composer run-script cs
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 99ae0bd..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,5 +0,0 @@
-language: node_js
-node_js:
-  - 8
-sudo: false
-
diff --git a/composer.json b/composer.json
index 131b2d0..bbaed11 100644
--- a/composer.json
+++ b/composer.json
@@ -1,42 +1,51 @@
 {
-    "name": "wikimedia/language-data",
-    "description": "CLDR based language data and utilities.",
-    "keywords": [
-        "cldr", "cldr-data", "internationalization", "localization", "l10n"
-    ],
-    "license": "GPL-2.0-or-later",
-    "authors": [{
-        "name": "Santhosh Thottingal",
-        "email": "santhosh.thottingal@gmail.com"
-    }, {
-        "name": "Amir Aharoni"
-    }, {
-        "name": "Niklas Laxström",
-        "email": "niklas.laxstrom@gmail.com"
-    }],
-    "type": "library",
-    "require": {
+	"name": "wikimedia/language-data",
+	"description": "CLDR based language data and utilities.",
+	"keywords": [
+		"cldr",
+		"cldr-data",
+		"internationalization",
+		"localization",
+		"l10n"
+	],
+	"license": "GPL-2.0-or-later",
+	"authors": [
+		{
+			"name": "Santhosh Thottingal",
+			"email": "santhosh.thottingal@gmail.com"
+		},
+		{
+			"name": "Amir Aharoni"
+		},
+		{
+			"name": "Niklas Laxström",
+			"email": "niklas.laxstrom@gmail.com"
+		}
+	],
+	"type": "library",
+	"require": {
 		"php": ">=7.2"
-    },
-    "require-dev": {
-        "phpunit/phpunit": "8.*",
-        "mediawiki/mediawiki-codesniffer": "29.0.0"
-    },
-    "support": {
-        "issues": "https://github.com/wikimedia/language-data/issues",
-        "irc": "irc://irc.freenode.net/mediawiki-i18n"
-    },
-    "autoload": {
-        "psr-4": {
-            "Wikimedia\\LanguageData\\": "src/"
-        }
+	},
+	"require-dev": {
+		"phpunit/phpunit": "8.*",
+		"mediawiki/mediawiki-codesniffer": "29.0.0"
+	},
+	"support": {
+		"issues": "https://github.com/wikimedia/language-data/issues",
+		"irc": "irc://irc.freenode.net/mediawiki-i18n"
+	},
+	"autoload": {
+		"psr-4": {
+			"Wikimedia\\LanguageData\\": "src/"
+		}
 	},
 	"scripts": {
 		"fix": "phpcbf",
+		"cs": "phpcs -p",
 		"test": [
-		  "composer validate --no-interaction",
-		  "phpunit tests/php/*",
-		  "phpcs -p"
+			"composer validate --no-interaction",
+			"phpunit tests/php/*",
+			"phpcs -p"
 		]
 	}
 }
diff --git a/package-lock.json b/package-lock.json
index b008ecf..3bd4b8c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,22 +1,22 @@
 {
   "name": "@wikimedia/language-data",
-  "version": "0.1.1",
+  "version": "0.1.2",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
     "@babel/code-frame": {
-      "version": "7.5.5",
-      "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.5.5.tgz",
-      "integrity": "sha512-27d4lZoomVyo51VegxI20xZPuSHusqbQag/ztrBC7wegWoQ1nLREPVSKSW8byhTlzTKyNE4ifaTA6lCp7JjpFw==",
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.8.3.tgz",
+      "integrity": "sha512-a9gxpmdXtZEInkCSHUJDLHZVBgb1QS0jhss4cPP93EW7s+uC5bikET2twEF3KV+7rDblJcmNvTR7VJejqd2C2g==",
       "dev": true,
       "requires": {
-        "@babel/highlight": "^7.0.0"
+        "@babel/highlight": "^7.8.3"
       }
     },
     "@babel/highlight": {
-      "version": "7.5.0",
-      "resolved": "https://registry.npmjs.org/@babel/highlight/-/highlight-7.5.0.tgz",
-      "integrity": "sha512-7dV4eu9gBxoM0dAnj/BCFDW9LFU0zvTrkq0ugM7pnHEgguOEeOz1so2ZghEdzviYzQEED0r4EAgpsBChKy1TRQ==",
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/highlight/-/highlight-7.8.3.tgz",
+      "integrity": "sha512-PX4y5xQUvy0fnEVHrYOarRPXVWafSjTW9T0Hab8gVIawpl2Sj0ORyrygANq+KjcNlSSTw0YCLSNA8OyZ1I4yEg==",
       "dev": true,
       "requires": {
         "chalk": "^2.0.0",
@@ -25,24 +25,24 @@
       }
     },
     "acorn": {
-      "version": "7.0.0",
-      "resolved": "https://registry.npmjs.org/acorn/-/acorn-7.0.0.tgz",
-      "integrity": "sha512-PaF/MduxijYYt7unVGRuds1vBC9bFxbNf+VWqhOClfdgy7RlVkQqt610ig1/yxTgsDIfW1cWDel5EBbOy3jdtQ==",
+      "version": "7.1.0",
+      "resolved": "https://registry.npmjs.org/acorn/-/acorn-7.1.0.tgz",
+      "integrity": "sha512-kL5CuoXA/dgxlBbVrflsflzQ3PAas7RYZB52NOm/6839iVYJgKMJ3cQJD+t2i5+qFa8h3MDpEOJiS64E8JLnSQ==",
       "dev": true
     },
     "acorn-jsx": {
-      "version": "5.0.2",
-      "resolved": "https://registry.npmjs.org/acorn-jsx/-/acorn-jsx-5.0.2.tgz",
-      "integrity": "sha512-tiNTrP1MP0QrChmD2DdupCr6HWSFeKVw5d/dHTu4Y7rkAkRhU/Dt7dphAfIUyxtHpl/eBVip5uTNSpQJHylpAw==",
+      "version": "5.1.0",
+      "resolved": "https://registry.npmjs.org/acorn-jsx/-/acorn-jsx-5.1.0.tgz",
+      "integrity": "sha512-tMUqwBWfLFbJbizRmEcWSLw6HnFzfdJs2sOJEOwwtVPMoH/0Ay+E703oZz78VSXZiiDcZrQ5XKjPIUQixhmgVw==",
       "dev": true
     },
     "ajv": {
-      "version": "6.10.2",
-      "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.10.2.tgz",
-      "integrity": "sha512-TXtUUEYHuaTEbLZWIKUr5pmBuhDLy+8KYtPYdcV8qC+pOZL+NKqYwvWSRrVXHn+ZmRRAu8vJTAznH7Oag6RVRw==",
+      "version": "6.11.0",
+      "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.11.0.tgz",
+      "integrity": "sha512-nCprB/0syFYy9fVYU1ox1l2KN8S9I+tziH8D4zdZuLT3N6RMlGSGt5FSTpAiHB/Whv8Qs1cWHma1aMKZyaHRKA==",
       "dev": true,
       "requires": {
-        "fast-deep-equal": "^2.0.1",
+        "fast-deep-equal": "^3.1.1",
         "fast-json-stable-stringify": "^2.0.0",
         "json-schema-traverse": "^0.4.1",
         "uri-js": "^4.2.2"
@@ -55,15 +55,18 @@
       "dev": true
     },
     "ansi-escapes": {
-      "version": "3.2.0",
-      "resolved": "https://registry.npmjs.org/ansi-escapes/-/ansi-escapes-3.2.0.tgz",
-      "integrity": "sha512-cBhpre4ma+U0T1oM5fXg7Dy1Jw7zzwv7lt/GoCpr+hDQJoYnKVPLL4dCvSEFMmQurOQvSrwT7SL/DAlhBI97RQ==",
-      "dev": true
+      "version": "4.3.0",
+      "resolved": "https://registry.npmjs.org/ansi-escapes/-/ansi-escapes-4.3.0.tgz",
+      "integrity": "sha512-EiYhwo0v255HUL6eDyuLrXEkTi7WwVCLAw+SeOQ7M7qdun1z1pum4DEm/nuqIVbPvi9RPPc9k9LbyBv6H0DwVg==",
+      "dev": true,
+      "requires": {
+        "type-fest": "^0.8.1"
+      }
     },
     "ansi-regex": {
-      "version": "3.0.0",
-      "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-3.0.0.tgz",
-      "integrity": "sha1-7QMXwyIGT3lGbAKWa922Bas32Zg=",
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-5.0.0.tgz",
+      "integrity": "sha512-bY6fj56OUQ0hU1KjFNDQuJFezqKdrAyFdIevADiqrWHwSlbmBNMHp5ak2f40Pm8JTFyM2mqxkG6ngkHO11f/lg==",
       "dev": true
     },
     "ansi-styles": {
@@ -154,12 +157,12 @@
       "dev": true
     },
     "cli-cursor": {
-      "version": "2.1.0",
-      "resolved": "https://registry.npmjs.org/cli-cursor/-/cli-cursor-2.1.0.tgz",
-      "integrity": "sha1-s12sN2R5+sw+lHR9QdDQ9SOP/LU=",
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/cli-cursor/-/cli-cursor-3.1.0.tgz",
+      "integrity": "sha512-I/zHAwsKf9FqGoXM4WWRACob9+SNukZTd94DWF57E4toouRulbCxcUh6RKUEOQlYTHJnzkPMySvPNaaSLNfLZw==",
       "dev": true,
       "requires": {
-        "restore-cursor": "^2.0.0"
+        "restore-cursor": "^3.1.0"
       }
     },
     "cli-width": {
@@ -169,33 +172,41 @@
       "dev": true
     },
     "cliui": {
-      "version": "4.1.0",
-      "resolved": "https://registry.npmjs.org/cliui/-/cliui-4.1.0.tgz",
-      "integrity": "sha512-4FG+RSG9DL7uEwRUZXZn3SS34DiDPfzP0VOiEwtUWlE+AR2EIg+hSyvrIgUUfhdgR/UkAeW2QHgeP+hWrXs7jQ==",
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/cliui/-/cliui-5.0.0.tgz",
+      "integrity": "sha512-PYeGSEmmHM6zvoef2w8TPzlrnNpXIjTipYK780YswmIP9vjxmd6Y2a3CB2Ks6/AU8NHjZugXvo8w3oWM2qnwXA==",
       "dev": true,
       "requires": {
-        "string-width": "^2.1.1",
-        "strip-ansi": "^4.0.0",
-        "wrap-ansi": "^2.0.0"
+        "string-width": "^3.1.0",
+        "strip-ansi": "^5.2.0",
+        "wrap-ansi": "^5.1.0"
       },
       "dependencies": {
-        "strip-ansi": {
-          "version": "4.0.0",
-          "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-4.0.0.tgz",
-          "integrity": "sha1-qEeQIusaw2iocTibY1JixQXuNo8=",
+        "emoji-regex": {
+          "version": "7.0.3",
+          "resolved": "https://registry.npmjs.org/emoji-regex/-/emoji-regex-7.0.3.tgz",
+          "integrity": "sha512-CwBLREIQ7LvYFB0WyRvwhq5N5qPhc6PMjD6bYggFlI5YyDgl+0vxq5VHbMOFqLg7hfWzmu8T5Z1QofhmTIhItA==",
+          "dev": true
+        },
+        "is-fullwidth-code-point": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-2.0.0.tgz",
+          "integrity": "sha1-o7MKXE8ZkYMWeqq5O+764937ZU8=",
+          "dev": true
+        },
+        "string-width": {
+          "version": "3.1.0",
+          "resolved": "https://registry.npmjs.org/string-width/-/string-width-3.1.0.tgz",
+          "integrity": "sha512-vafcv6KjVZKSgz06oM/H6GDBrAtz8vdhQakGjFIvNrHA6y3HCF1CInLy+QLq8dTJPQ1b+KDUqDFctkdRW44e1w==",
           "dev": true,
           "requires": {
-            "ansi-regex": "^3.0.0"
+            "emoji-regex": "^7.0.1",
+            "is-fullwidth-code-point": "^2.0.0",
+            "strip-ansi": "^5.1.0"
           }
         }
       }
     },
-    "code-point-at": {
-      "version": "1.1.0",
-      "resolved": "https://registry.npmjs.org/code-point-at/-/code-point-at-1.1.0.tgz",
-      "integrity": "sha1-DQcLTQQ6W+ozovGkDi7bPZpMz3c=",
-      "dev": true
-    },
     "color-convert": {
       "version": "1.9.3",
       "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-1.9.3.tgz",
@@ -284,38 +295,34 @@
       }
     },
     "emoji-regex": {
-      "version": "7.0.3",
-      "resolved": "https://registry.npmjs.org/emoji-regex/-/emoji-regex-7.0.3.tgz",
-      "integrity": "sha512-CwBLREIQ7LvYFB0WyRvwhq5N5qPhc6PMjD6bYggFlI5YyDgl+0vxq5VHbMOFqLg7hfWzmu8T5Z1QofhmTIhItA==",
+      "version": "8.0.0",
+      "resolved": "https://registry.npmjs.org/emoji-regex/-/emoji-regex-8.0.0.tgz",
+      "integrity": "sha512-MSjYzcWNOA0ewAHpz0MxpYFvwg6yjy1NG3xteoqz644VCo/RPgnr1/GGt+ic3iJTzQ8Eu3TdM14SawnVUmGE6A==",
       "dev": true
     },
-    "end-of-stream": {
-      "version": "1.4.1",
-      "resolved": "https://registry.npmjs.org/end-of-stream/-/end-of-stream-1.4.1.tgz",
-      "integrity": "sha512-1MkrZNvWTKCaigbn+W15elq2BB/L22nqrSY5DKlo3X6+vclJm8Bb5djXJBmEX6fS3+zCh/F4VBK5Z2KxJt4s2Q==",
-      "dev": true,
-      "requires": {
-        "once": "^1.4.0"
-      }
-    },
     "es-abstract": {
-      "version": "1.13.0",
-      "resolved": "https://registry.npmjs.org/es-abstract/-/es-abstract-1.13.0.tgz",
-      "integrity": "sha512-vDZfg/ykNxQVwup/8E1BZhVzFfBxs9NqMzGcvIJrqg5k2/5Za2bWo40dK2J1pgLngZ7c+Shh8lwYtLGyrwPutg==",
+      "version": "1.17.4",
+      "resolved": "https://registry.npmjs.org/es-abstract/-/es-abstract-1.17.4.tgz",
+      "integrity": "sha512-Ae3um/gb8F0mui/jPL+QiqmglkUsaQf7FwBEHYIFkztkneosu9imhqHpBzQ3h1vit8t5iQ74t6PEVvphBZiuiQ==",
       "dev": true,
       "requires": {
-        "es-to-primitive": "^1.2.0",
+        "es-to-primitive": "^1.2.1",
         "function-bind": "^1.1.1",
         "has": "^1.0.3",
-        "is-callable": "^1.1.4",
-        "is-regex": "^1.0.4",
-        "object-keys": "^1.0.12"
+        "has-symbols": "^1.0.1",
+        "is-callable": "^1.1.5",
+        "is-regex": "^1.0.5",
+        "object-inspect": "^1.7.0",
+        "object-keys": "^1.1.1",
+        "object.assign": "^4.1.0",
+        "string.prototype.trimleft": "^2.1.1",
+        "string.prototype.trimright": "^2.1.1"
       }
     },
     "es-to-primitive": {
-      "version": "1.2.0",
-      "resolved": "https://registry.npmjs.org/es-to-primitive/-/es-to-primitive-1.2.0.tgz",
-      "integrity": "sha512-qZryBOJjV//LaxLTV6UC//WewneB3LcXOL9NP++ozKVXsIIIpm/2c13UDiD9Jp2eThsecw9m3jPqDwTyobcdbg==",
+      "version": "1.2.1",
+      "resolved": "https://registry.npmjs.org/es-to-primitive/-/es-to-primitive-1.2.1.tgz",
+      "integrity": "sha512-QCOllgZJtaUo9miYBcLChTUaHNjJF3PYs1VidD7AwiEj1kYxKeQTctLAezAOH5ZKRH0g2IgPn6KwB4IT8iRpvA==",
       "dev": true,
       "requires": {
         "is-callable": "^1.1.4",
@@ -336,9 +343,9 @@
       "dev": true
     },
     "eslint": {
-      "version": "6.2.2",
-      "resolved": "https://registry.npmjs.org/eslint/-/eslint-6.2.2.tgz",
-      "integrity": "sha512-mf0elOkxHbdyGX1IJEUsNBzCDdyoUgljF3rRlgfyYh0pwGnreLc0jjD6ZuleOibjmnUWZLY2eXwSooeOgGJ2jw==",
+      "version": "6.8.0",
+      "resolved": "https://registry.npmjs.org/eslint/-/eslint-6.8.0.tgz",
+      "integrity": "sha512-K+Iayyo2LtyYhDSYwz5D5QdWw0hCacNzyq1Y821Xna2xSJj7cijoLLYmLxTQgcgZ9mC61nryMy9S7GRbYpI5Ig==",
       "dev": true,
       "requires": {
         "@babel/code-frame": "^7.0.0",
@@ -348,19 +355,19 @@
         "debug": "^4.0.1",
         "doctrine": "^3.0.0",
         "eslint-scope": "^5.0.0",
-        "eslint-utils": "^1.4.2",
+        "eslint-utils": "^1.4.3",
         "eslint-visitor-keys": "^1.1.0",
-        "espree": "^6.1.1",
+        "espree": "^6.1.2",
         "esquery": "^1.0.1",
         "esutils": "^2.0.2",
         "file-entry-cache": "^5.0.1",
         "functional-red-black-tree": "^1.0.1",
         "glob-parent": "^5.0.0",
-        "globals": "^11.7.0",
+        "globals": "^12.1.0",
         "ignore": "^4.0.6",
         "import-fresh": "^3.0.0",
         "imurmurhash": "^0.1.4",
-        "inquirer": "^6.4.1",
+        "inquirer": "^7.0.0",
         "is-glob": "^4.0.0",
         "js-yaml": "^3.13.1",
         "json-stable-stringify-without-jsonify": "^1.0.1",
@@ -369,7 +376,7 @@
         "minimatch": "^3.0.4",
         "mkdirp": "^0.5.1",
         "natural-compare": "^1.4.0",
-        "optionator": "^0.8.2",
+        "optionator": "^0.8.3",
         "progress": "^2.0.0",
         "regexpp": "^2.0.1",
         "semver": "^6.1.2",
@@ -402,9 +409,9 @@
       }
     },
     "eslint-plugin-no-jquery": {
-      "version": "2.1.0",
-      "resolved": "https://registry.npmjs.org/eslint-plugin-no-jquery/-/eslint-plugin-no-jquery-2.1.0.tgz",
-      "integrity": "sha512-5sr5tOJRfuRviyAvFTe/mr80TXWxTteD/JHRuJtDN8q/bxAh16eSKoKLAevLC7wZCRN2iwnEfhQPQV4rp/gYtg==",
+      "version": "2.3.1",
+      "resolved": "https://registry.npmjs.org/eslint-plugin-no-jquery/-/eslint-plugin-no-jquery-2.3.1.tgz",
+      "integrity": "sha512-/fiQUBSOMUETnfBuiK5ewvtRbek1IRTy5ov/6RZ6nlybvZ337vyGaNPWM1KgaIoIeN7dairNrPfq0h7A0tpT3A==",
       "dev": true
     },
     "eslint-plugin-qunit": {
@@ -424,12 +431,12 @@
       }
     },
     "eslint-utils": {
-      "version": "1.4.2",
-      "resolved": "https://registry.npmjs.org/eslint-utils/-/eslint-utils-1.4.2.tgz",
-      "integrity": "sha512-eAZS2sEUMlIeCjBeubdj45dmBHQwPHWyBcT1VSYB7o9x9WRRqKxyUoiXlRjyAwzN7YEzHJlYg0NmzDRWx6GP4Q==",
+      "version": "1.4.3",
+      "resolved": "https://registry.npmjs.org/eslint-utils/-/eslint-utils-1.4.3.tgz",
+      "integrity": "sha512-fbBN5W2xdY45KulGXmLHZ3c3FHfVYmKg0IrAKGOkT/464PQsx2UeIzfz1RmEci+KLm1bBaAzZAh8+/E+XAeZ8Q==",
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@@ -1709,24 +1668,35 @@
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+      "resolved": "https://registry.npmjs.org/yargs/-/yargs-13.3.0.tgz",
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       "dev": true,
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-        "cliui": "^4.0.0",
+        "cliui": "^5.0.0",
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-        "os-locale": "^3.1.0",
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         "string-width": "^3.0.0",
         "which-module": "^2.0.0",
         "y18n": "^4.0.0",
-        "yargs-parser": "^13.0.0"
+        "yargs-parser": "^13.1.1"
       },
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+        "emoji-regex": {
+          "version": "7.0.3",
+          "resolved": "https://registry.npmjs.org/emoji-regex/-/emoji-regex-7.0.3.tgz",
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+          "dev": true
+        },
+        "is-fullwidth-code-point": {
+          "version": "2.0.0",
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@@ -1741,9 +1711,9 @@
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@@ -1751,58 +1721,14 @@
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+      "resolved": "https://registry.npmjs.org/yargs-unparser/-/yargs-unparser-1.6.0.tgz",
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-        "yargs": "^12.0.5"
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-          "dev": true,
-          "requires": {
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+        "lodash": "^4.17.15",
+        "yargs": "^13.3.0"
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   }
diff --git a/package.json b/package.json
index 8a72a37..69d527d 100644
--- a/package.json
+++ b/package.json
@@ -36,6 +36,7 @@
   },
   "license": "GPL-2.0-or-later",
   "scripts": {
-    "test": "mocha tests/js/*.js"
+    "test": "mocha tests/js/*.js",
+    "lint": "eslint src/*.js"
   }
 }